There are twelve bhav or house or place in horoscope .Each Bhav represent some facts of life.

Tatwa are four in types.

1.Agni/Fire

2.Prithvi/Earth

3.Vayu/Air

4.Jal/Water

The 1st house(lagna or ascendant),5th house and 9th house -are  Agni tatwa or fire element houses or bhavas in a horoscope.

The second house ,sixth house and the tenth house–are Prithvi tatwa–or earth element houses or bhavas  in a horoscope.

The Third house ,seventh house and eleventh house–are Vayu tatwa /Air element houses in a horoscope.

The Fourth house, eighth house and the twelfth house–are the jal tatwa /water element houses in a horoscope.

Bhav                Tatwa

——                +——-

1,5 ,9                +Agni Tatwa

2,6,10                +Prithvi Tatwa

3,7,11                +Vayu Tatwa

4,8,12                +Jal Tatwa